The latest version of Apple's mobile operating system is out today. So you'll be able to update your iPhone or iPad later on to give it a whole new look and feel.
Apple hasn't confirmed when exactly you'll be able to update your device, but going on past years it should be this evening sometime.
There's usually a huge rush at first, as everyone tries to upgrade at once, so you might be in for a bit of a wait.
iOS 7 is free to download. It'll work on an iPhone 4, 4S or 5, iPad 2 or later, iPad mini, and fifth generation iPod touch.
If you have an older device there's a chance there could be some compatibility issues, so it might be worth waiting to see which bugs come out before upgrading.
iOS 7 is a lot more colourful than iOS 6, and has a ton of new features, such as a new unlock screen, a 3D view, better multi-tasking, and much more.
It marks a shift from Apple's skeuomorphic design, which rendered digital versions of real-world textures like leather and wood.
Apple will also introduce two new iPhones this week: the iPhone 5s, which comes with a fingerprint scanner to bolster security, and the 5c, which is available in a range of bright colours to match the new OS.